Granted Patent
Utility
US 6,129,829 · App. 09/311,943
Electrostatic filter for dielectric fluid
Inventor:
Donald Eric Thompson
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: May 14, 1999
Inventor
Donald Eric Thompson
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.